A kind of measuring hole adjusting device suitable for positive pressure flue gas chimney

Abstract

This invention proposes a measuring hole adjustment device suitable for positive pressure flue gas ducts, comprising an upper mounting plate, a sliding plate, and a lower mounting plate. The lower mounting plate is connected to the flue gas duct. The lower and upper mounting plates are respectively provided with a first through hole and a second through hole, and the upper and lower mounting plates are fixed relative to each other. Multiple sliding plates are slidably disposed between the upper and lower mounting plates, arranged sequentially along the circumference. Each sliding plate has a mounting hole at its end near the measuring hole. When the sliding plates move away from the measuring hole, the mounting hole opens; when they move towards the measuring hole, the mounting hole closes. A rotating plate for controlling the movement of the sliding plates is movably connected to the side of the upper mounting plate away from the lower mounting plate. The rotating plate is provided with a third through hole, and the first, second, and third through holes are coaxial. This invention enables variable-diameter opening and closing of the measuring hole, improving the convenience and safety of placing the testing equipment.

Description

Technical Field

[0001] This invention relates to the field of orifice measurement technology for positive pressure flue gas ducts, and specifically to an orifice adjustment device suitable for positive pressure flue gas ducts. Background Technology

[0002] In industrial production sectors such as coal-fired power plants and steel mills, boilers, as core production equipment, continuously generate large amounts of flue gas during combustion. In the flue gas treatment process, the flue gas flows through an induced draft fan and is transformed into positive pressure flue gas. The flue at the outlet of the induced draft fan is generally connected to the inlet of the desulfurization island. Measuring holes are usually installed on this section of the flue to measure data such as temperature, pressure, and dust concentration, providing data support for adjusting industrial production conditions and environmental monitoring. To prevent positive-pressure flue gas from escaping through the test holes when not performing testing, thus avoiding environmental pollution and protecting on-site personnel from flue gas exposure, single-layer flanges or plugs are commonly used to seal the test holes. While these devices achieve basic sealing when not in use, they have shortcomings when testing is being conducted. Testers must first open the flange or plug to insert the probe of the testing equipment into the flue for data collection. However, due to the positive pressure inside the flue, high-temperature, undesulfurized flue gas erupts at high speed through the test hole the moment it is opened. This high-speed gas ejection not only creates significant airflow resistance to the insertion of the probe, making it difficult for the equipment to be positioned smoothly, but also risks exposing or inhaling the gas to testers, posing a serious threat to their health and posing a significant safety hazard. In addition, existing borehole measuring devices can only seal the borehole and cannot fix the testing equipment. When the testing equipment is placed in the borehole for testing, other tools or manual intervention are required to keep the testing equipment in place, which increases the complexity of the testing process and the safety risks. Summary of the Invention

[0003] To address the problems in the background art, the present invention proposes a measuring hole adjustment device suitable for positive pressure flue gas ducts, comprising an upper mounting plate, a sliding plate, and a lower mounting plate. The lower mounting plate is connected to the flue gas duct, and the lower mounting plate and the upper mounting plate are respectively provided with a first through hole and a second through hole. The upper mounting plate and the lower mounting plate are fixed relative to each other. The sliding piece is slidably disposed between the upper mounting piece and the lower mounting piece. There are multiple sliding pieces, which are arranged sequentially along the circumference. The end of the multiple sliding pieces near the measuring hole forms a mounting hole. When the multiple sliding pieces move away from the measuring hole, the mounting hole opens. When the multiple sliding pieces move closer to the measuring hole, the mounting hole closes. The upper mounting plate is movably connected to a rotating plate for controlling the movement of the sliding plate on the side away from the lower mounting plate. The rotating plate is provided with a third through hole, and the first through hole, the second through hole and the third through hole are coaxial. Preferably, the upper mounting plate has a plurality of first inclined grooves along the circumference of the second through hole, and the lower mounting plate has a plurality of long grooves. The plurality of long grooves are arranged sequentially along the circumference of the first through hole to form a polygonal shape. The long grooves are parallel to one diameter of the first through hole. Each long groove corresponds to a position of a first inclined groove. The end of the first inclined groove near the second through hole is located above the end of the long groove, and the position of the end of the first inclined groove near the second through hole extends out to the side of the long groove near the first through hole. The rotating plate is provided with a second inclined groove corresponding to the number and position of the first inclined groove. The second inclined groove is inclined in the opposite direction to the first inclined groove. A lower fixing rod is fixed on the side of the sliding plate near the lower mounting plate, and an upper fixing rod is fixed on the side of the sliding plate near the upper mounting plate. The lower fixing rod on the sliding plate is slidably disposed in a long groove, and the upper fixing rod on the sliding plate is slidably disposed in a first inclined groove and a second inclined groove. The lower fixing rod and the upper fixing rod on the same sliding plate are respectively located in adjacent long grooves and first inclined grooves.

[0004] Preferably, the end of the sliding piece near the measuring hole is an angular structure, which is formed by the intersection of two sides of the sliding piece. The two sides are a first side and a second side, respectively. The first side of a sliding piece is in contact with and parallel to the second side of the sliding piece connected to it.

[0005] Preferably, a threaded cylinder is fixed to the side of the upper mounting plate away from the lower mounting plate, and the rotating plate is threadedly connected to the threaded cylinder.

[0006] Preferably, the upper mounting plate and the lower mounting plate are respectively provided with a first bolt hole and a second bolt hole. The number and position of the first bolt hole and the second bolt hole are corresponding. Bolts are passed through the first bolt hole and the second bolt hole in sequence and tightened with nuts. The upper mounting plate and the lower mounting plate are fixedly connected by the cooperation of bolts, nuts, first bolt holes and second bolt holes.

[0007] Preferably, the upper mounting plate has multiple screw cylinders on its circumference away from the lower mounting plate. The length of each screw cylinder is not less than the thickness of the bolt head. One end of each screw cylinder has a third bolt hole corresponding to the number and position of the screw cylinders. The screw cylinders are fixedly connected to the upper mounting plate through the cooperation of the first bolt, the third bolt hole, and the screw cylinders.

[0008] Preferably, an operating handle is fixed to the side of the rotating plate away from the upper mounting plate.

[0009] Preferably, a clamping plate is fixed to one end of the sliding piece near the mounting hole, and the clamping plate is located on the side of the sliding piece that is close to and / or away from the measuring hole.

[0010] Preferably, the upper fixing rod, the lower fixing rod, and the sliding plate are all made of titanium, and the upper mounting plate and the lower mounting plate are both made of stainless steel.

[0011] Preferably, a measuring hole pipe is welded onto the flue, the measuring hole is located inside the measuring hole pipe, and the lower mounting plate is welded to the end of the measuring hole pipe away from the flue.

[0012] The beneficial effects of this invention are as follows: This invention can form a variable-diameter mounting hole by combining multiple sliding pieces. The movement of multiple sliding pieces opens or closes the mounting hole, allowing the testing device to match the mounting hole. This avoids the situation where the outer diameter of the testing device is smaller than the diameter of the measuring hole. There is no need to use other objects to fix the testing device; the sliding pieces can clamp the testing device, improving the fixation effect of the testing device position.

[0013] Meanwhile, the invention is simple to operate. Rotating the rotating plate moves multiple sliding pieces. By controlling the rotation direction and angle of the rotating plate, the opening or closing of the mounting hole and the size of the hole diameter can be controlled, making the operation simple. Furthermore, the rotating plate is threadedly connected to the upper mounting piece through a threaded cylinder. The thread can lock the rotating plate. When the rotating plate is rotated without external force, the position of the rotating plate can be relatively fixed, and the position of the sliding pieces can also be relatively fixed, thereby achieving the clamping and locking effect on the position of the detection equipment.

[0014] Furthermore, when installing testing equipment, this invention eliminates the need for the measuring hole to be fully opened. The sliding plate can partially block the measuring hole, reducing the amount of positive pressure flue gas escaping when the measuring hole is open, thus ensuring the safety of testing personnel. This invention enables variable-diameter opening and closing of the measuring hole, improving the convenience and safety of placing the testing equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the mounting plate structure of the present invention; Figure 3 This is a schematic diagram of the mounting plate structure of the present invention; Figure 4 This is a schematic diagram of the structure after multiple sliding pieces are combined according to the present invention; Figure 5 This is a schematic diagram of the sliding plate structure of the present invention; Figure 6 This is a schematic diagram of the threaded cylinder structure of the present invention; Figure 7 This is a schematic diagram of the rotating plate structure of the present invention.

[0016] The following are the labels in the diagram: 1. Sliding plate; 2. Upper fixing rod; 3. Lower fixing rod; 4. First bolt hole; 5. Mounting hole; 6. Upper mounting plate; 7. Lower mounting plate; 8. Second bolt hole; 9. First inclined groove; 10. Long groove; 11. First through hole; 12. Second through hole; 13. First side; 14. Second side; 15. Threaded cylinder; 16. Third bolt hole; 17. Threaded cylinder; 18. Rotating plate; 19. Operating handle; 20. Second inclined groove; 21. Clamping plate; 22. Third through hole. Detailed Implementation

[0017] To make the present invention clearer and more understandable, the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the given embodiments are only one of the implementation methods and do not represent all embodiments.

[0018] In this article, terms such as "inner," "outer," "upper," and "lower" are established based on the positional relationships shown in the attached drawings. Depending on the attached drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection.

[0019] Combined with appendix Figure 1 - Appendix Figure 7 A measuring hole adjustment device suitable for positive pressure flue gas ducts, comprising an upper mounting plate 6, a sliding plate 1, and a lower mounting plate 7, wherein the lower mounting plate 7 is connected to the flue, and the lower mounting plate 7 and the upper mounting plate 6 are respectively provided with a first through hole 11 and a second through hole 12. The upper mounting plate 6 and the lower mounting plate 7 are fixed relative to each other. After the lower mounting plate 7 is connected to the flue, the measuring hole corresponds to the position of the first through hole 11. The sliding piece 1 is slidably disposed between the upper mounting piece 6 and the lower mounting piece 7. There are multiple sliding pieces 1, which are arranged sequentially along the circumference. The end of the multiple sliding pieces 1 near the measuring hole forms a mounting hole 5. When the multiple sliding pieces 1 move away from the measuring hole, the mounting hole 5 opens. When the multiple sliding pieces 1 move closer to the measuring hole, the mounting hole 5 closes. The upper mounting plate 6 is movably connected to a rotating plate 18 for controlling the movement of the sliding plate 1 on the side away from the lower mounting plate 7. The rotating plate 18 is provided with a third through hole 22, and the first through hole 11, the second through hole 12 and the third through hole 22 are coaxial. Specifically, the upper mounting plate 6 is provided with a plurality of first inclined grooves 9 along the circumference of the second through hole 12, and the lower mounting plate 7 is provided with a plurality of long grooves 10. The plurality of long grooves 10 are arranged sequentially along the circumference of the first through hole 11 to form a polygonal shape. The long grooves 10 are parallel to one diameter of the first through hole 11. Each long groove 10 corresponds to a position of a first inclined groove 9. The end of the first inclined groove 9 near the second through hole 12 is located above the end of the long groove 10, and the position of the end of the first inclined groove 9 near the second through hole 12 extends out to the side of the long groove 10 near the first through hole 11. The rotating plate 18 is provided with a second inclined groove 20 corresponding to the number and position of the first inclined groove 9. The second inclined groove 20 is inclined in the opposite direction to the first inclined groove 9. A lower fixing rod 3 is fixed on the side of the sliding plate 1 near the lower mounting plate 7, and an upper fixing rod 2 is fixed on the side of the sliding plate 1 near the upper mounting plate 6. The lower fixing rod 3 on the sliding plate 1 is slidably disposed in a long groove 10, and the upper fixing rod 2 on the sliding plate 1 is slidably disposed in a first inclined groove 9 and a second inclined groove 20. The lower fixing rod 3 and the upper fixing rod 2 on the same sliding plate 1 are respectively located in the long groove 10 and the first inclined groove 9, which are adjacent to each other.

[0020] The first inclined groove 9 and the long groove 10 are used to restrict the movement path of the sliding piece 1, and the limiting effect of the second inclined groove 20 on the upper fixed rod 2 is used to drive the movement of the sliding piece 1.

[0021] Specifically, the end of the sliding piece 1 near the measuring hole is an angular structure, which is formed by the intersection of two sides of the sliding piece 1. The two sides are a first side 13 and a second side 14, respectively. The first side 13 of a sliding piece 1 is in contact with and parallel to the second side 14 of the connected sliding piece 1.

[0022] Specifically, a threaded cylinder 15 is fixed to the side of the upper mounting plate 6 away from the lower mounting plate 7, and the rotating plate 18 is threadedly connected to the threaded cylinder 15. When the rotating plate 18 rotates, it rotates and moves up and down along the threaded cylinder 15. The length of the upper fixing rod 2 should ensure that the rotating plate 18 remains in the second inclined groove 20 when it rotates to the end of the threaded cylinder 15 away from the sliding plate 1. When the rotating plate 18 is not rotating, the threaded connection between the rotating plate 18 and the threaded cylinder 15 fixes the position of the rotating plate 18. When a testing device is placed in the mounting hole 5, rotating the rotating plate 18 until it cannot be turned further indicates that the sliding plate 1 has clamped the testing device, improving the fixation effect of the testing device's position. Specifically, the inner wall of the threaded cylinder 15 is provided with internal threads, and the outer wall of the rotating plate 18 is provided with external threads that match the internal threads.

[0023] More specifically, the upper mounting plate 6 and the lower mounting plate 7 are respectively provided with a first bolt hole 4 and a second bolt hole 8. The number and position of the first bolt hole 4 and the second bolt hole 8 are corresponding. Bolts are passed through the first bolt hole 4 and the second bolt hole 8 in sequence and tightened with nuts. The upper mounting plate 6 and the lower mounting plate 7 are fixedly connected by the cooperation of bolts, nuts, first bolt holes 4 and second bolt holes 8.

[0024] The upper mounting plate 6 has multiple threaded cylinders 17 on its circumference away from the lower mounting plate 7. The length of each threaded cylinder 17 is not less than the thickness of the bolt head. One end of each threaded cylinder 15 has a third bolt hole 16 corresponding to the number and position of the threaded cylinders 17. The threaded cylinder 15 is fixedly connected to the upper mounting plate 6 through the cooperation of the first bolt, the third bolt hole 16, and the threaded cylinders 17. The threaded cylinders 17 allow for a gap between the upper mounting plate 6 and the threaded cylinders 15, providing space for bolt placement. More specifically, the positions of the first bolt holes 4 and the threaded cylinders 17 are staggered, meaning one threaded cylinder 17 is located between two first bolt holes 4, preventing interference between the positions of the first bolts and affecting assembly operations.

[0025] Specifically, an operating handle 19 is fixed to the side of the rotating plate 18 away from the upper mounting plate 6. The operating handle 19 facilitates the rotation of the rotating plate 18 by the inspection personnel.

[0026] Specifically, a clamping plate 21 is fixed to one end of the sliding piece 1 near the mounting hole 5. The clamping plate 21 is located on the side of the sliding piece 1 that is closer to and / or farther from the measuring hole. The clamping plate 21 can increase the contact area between the sliding piece 1 and the testing equipment, thereby improving the clamping and fixing effect on the testing equipment.

[0027] Specifically, the upper fixing rod 2, the lower fixing rod 3, and the sliding plate 1 are all made of titanium, while the upper mounting plate 6 and the lower mounting plate 7 are both made of stainless steel. Stainless steel is corrosion-resistant and inexpensive. Using these materials can improve the service life of the device and reduce manufacturing costs.

[0028] Specifically, a measuring hole pipe is welded on the flue, the measuring hole is located inside the measuring hole pipe, and the lower mounting plate 7 is welded to the end of the measuring hole pipe away from the flue.

[0029] Usage process: When installation is required, first drill holes in the positive pressure flue wall panel and weld them to the measuring hole pipe. Then weld the lower mounting plate 7 to the measuring hole pipe, ensuring that the first through hole 11 of the lower mounting plate 7 is aligned with the measuring hole pipe. Place the lower fixing rod 3 of the sliding plate 1 into its corresponding long slot 10. Pass the upper fixing rod 2 of the sliding plate 1 through the corresponding first inclined slot 9. Use bolts to pass through the bolt holes of the upper mounting plate 6 and the lower mounting plate 7 and tighten them with nuts. Then fix the threaded cylinder 15 to the upper mounting plate 6 with the first bolt. Place the rotating plate 18 so that the upper fixing rod 2 of the sliding plate 1 passes through the corresponding second inclined slot 20. Thread the rotating plate 18 to the threaded cylinder 15. The installation is now complete.

[0030] Under normal conditions, multiple sliding plates 1 close the measuring hole. When testing is required, rotating plate 18 is turned, causing upper fixing rod 2 to slide the sliding plates 1 outward (away from the measuring hole), opening the mounting hole 5 and thus opening the measuring hole. The testing device (such as a sampling tube) is then placed into the measuring hole, and rotating plate 18 is then turned in the opposite direction, causing upper fixing rod 2 to slide the sliding plates 1 inward (closer to the measuring hole). The sampling tube is then adjusted to a suitable position and secured. Because the sliding plates 1 block the flue gas, it prevents flue gas leakage from harming personnel.

[0031] Although embodiments of the invention have been shown and described, those skilled in the art will be able to make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A measuring orifice adjustment device suitable for positive pressure flue gas ducts, characterized in that: It includes an upper mounting plate (6), a sliding plate (1) and a lower mounting plate (7). The lower mounting plate (7) is connected to the flue. The lower mounting plate (7) and the upper mounting plate (6) are respectively provided with a first through hole (11) and a second through hole (12). The upper mounting plate (6) and the lower mounting plate (7) are fixed relative to each other. The sliding piece (1) is slidably disposed between the upper mounting piece (6) and the lower mounting piece (7). There are multiple sliding pieces (1), which are arranged in sequence along the circumference. The end of the multiple sliding pieces (1) near the measuring hole forms a mounting hole (5). When the multiple sliding pieces (1) move away from the measuring hole, the mounting hole (5) opens. When the multiple sliding pieces (1) move closer to the measuring hole, the mounting hole (5) closes. The upper mounting plate (6) is movably connected to a rotating plate (18) for controlling the movement of the sliding plate (1) on the side away from the lower mounting plate (7). The rotating plate (18) is provided with a third through hole (22), and the first through hole (11), the second through hole (12) and the third through hole (22) are coaxial.

2. The orifice adjustment device for positive pressure flue gas ducts according to claim 1, characterized in that: The upper mounting plate (6) is provided with a plurality of first inclined grooves (9) along the circumference of the second through hole (12), and the lower mounting plate (7) is provided with a plurality of long grooves (10). The plurality of long grooves (10) are arranged sequentially along the circumference of the first through hole (11) to form a polygonal shape. The long grooves (10) are parallel to one diameter of the first through hole (11). Each long groove (10) corresponds to a position of a first inclined groove (9). The end of the first inclined groove (9) near the second through hole (12) is located above the end of the long groove (10), and the position of the end of the first inclined groove (9) near the second through hole (12) extends out to the side of the long groove (10) near the first through hole (11). The rotating plate (18) is provided with a second inclined groove (20) corresponding to the number and position of the first inclined groove (9). The second inclined groove (20) is inclined in the opposite direction to the first inclined groove (9). The sliding plate (1) is fixed with a lower fixing rod (3) on the side near the lower mounting plate (7) and an upper fixing rod (2) on the side near the upper mounting plate (6). The lower fixing rod (3) on the sliding plate (1) is slidably disposed in a long groove (10). The upper fixing rod (2) on the sliding plate (1) is slidably disposed in a first inclined groove (9) and a second inclined groove (20). The lower fixing rod (3) and the upper fixing rod (2) on the same sliding plate (1) are respectively located in the long groove (10) and the first inclined groove (9) with adjacent positions.

3. The orifice adjustment device for positive pressure flue gas ducts according to claim 2, characterized in that: The end of the sliding piece (1) near the measuring hole is an angular structure. The angular structure is formed by the intersection of two sides of the sliding piece (1). The two sides are the first side (13) and the second side (14). The first side (13) of a sliding piece (1) is in contact with and parallel to the second side (14) of the connected sliding piece (1).

4. The orifice adjustment device for positive pressure flue gas ducts according to claim 3, characterized in that: The upper mounting plate (6) is fixed with a threaded cylinder (15) on the side away from the lower mounting plate (7), and the rotating plate (18) is threadedly connected to the threaded cylinder (15).

5. The orifice adjustment device for positive pressure flue gas ducts according to claim 4, characterized in that: The upper mounting plate (6) and the lower mounting plate (7) are respectively provided with a first bolt hole (4) and a second bolt hole (8). The number and position of the first bolt hole (4) and the second bolt hole (8) are corresponding. Bolts are passed through the first bolt hole (4) and the second bolt hole (8) in sequence and tightened with nuts. The upper mounting plate (6) and the lower mounting plate (7) are fixedly connected by the cooperation of bolts, nuts, first bolt holes (4) and second bolt holes (8).

6. The orifice adjustment device for positive pressure flue gas ducts according to claim 5, characterized in that: The upper mounting plate (6) has multiple screw cylinders (17) on its periphery away from the lower mounting plate (7). The length of the screw cylinder (17) is not less than the thickness of the bolt head. One end of the threaded cylinder (15) is provided with a third bolt hole (16) corresponding to the number and position of the screw cylinders (17). The threaded cylinder (15) is fixedly connected to the upper mounting plate (6) through the cooperation of the first bolt, the third bolt hole (16) and the screw cylinders (17).

7. The orifice adjustment device for positive pressure flue gas ducts according to claim 6, characterized in that: An operating handle (19) is fixed on the side of the rotating plate (18) away from the upper mounting plate (6).

8. The orifice adjustment device for positive pressure flue gas ducts according to claim 3, characterized in that: A clamp (21) is fixed to one end of the sliding piece (1) near the mounting hole (5). The clamp (21) is located on the side of the sliding piece (1) near the measuring hole and / or away from the measuring hole.

9. A measuring hole adjustment device for positive pressure flue gas ducts according to claim 2, characterized in that: The upper fixing rod (2), the lower fixing rod (3) and the sliding piece (1) are all made of titanium, and the upper mounting piece (6) and the lower mounting piece (7) are both made of stainless steel.

10. A measuring hole adjustment device for positive pressure flue gas ducts according to claim 1, characterized in that: A measuring hole pipe is welded on the flue, and the measuring hole is located inside the measuring hole pipe. The lower mounting plate (7) is welded to the end of the measuring hole pipe away from the flue.

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